Emm... sorry for always suggesting exp stuff... China pump... do remember that "not-so-superior" pumps consume more energy and emit more heat to the tank. That's what I observe after my upgrading from Sicce (Italian) to Aquabee (German)... so if compared to China brand... I'm sure the difference gonna be very significant. I am so confident with my Aquabees now I lowered myt tank temperature from 27ºC to 26ºC.
I have a spare Sicce Multi 2500,. let me know if u r interested. Can offer u installment plan if you interested